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[Electrolytic changes in febrile convulsions]
Insights
Children with febrile convulsions often have lower serum sodium and calcium levels. This electrolyte imbalance, particularly hyponatremia, may contribute to seizure recurrence in susceptible children.
Area of Science:
- Pediatric Neurology
- Clinical Biochemistry
- Electrolyte Metabolism
Context:
- Febrile convulsions are common in children, affecting approximately 2-5% of those under six years old.
- Metabolic disturbances, including electrolyte imbalances, are suspected contributors to seizure activity.
- Understanding these metabolic parameters is crucial for managing and preventing recurrent febrile seizures.
Purpose:
- To investigate and compare serum levels of key metabolic parameters (sodium, potassium, calcium, glucose, proteins, nitrogen, creatinine) in children with febrile convulsions.
- To establish reference ranges for these parameters in healthy children and those with fever but without convulsions.
- To determine the potential role of electrolyte modifications, specifically hyponatremia, in the recurrence of febrile convulsions.
Summary:
- Serum levels of sodium, calcium, and osmolarity were significantly lower in 159 children experiencing febrile convulsions compared to control groups (children with fever and healthy children).
- Hyponatremia was observed in some children with febrile convulsions and even in some with fever alone, suggesting a potential predisposition.
- The study posits that electrolyte imbalances, particularly hyponatremia, may lower neuromuscular excitability thresholds, potentially contributing to seizure relapses.
Impact:
- Identifies specific metabolic derangements associated with febrile convulsions, aiding in diagnosis and risk assessment.
- Suggests that electrolyte monitoring and correction, especially for sodium levels, could be a therapeutic strategy to reduce febrile seizure recurrence.
- Provides insights into the pathophysiology of febrile seizures, highlighting the interplay between electrolytes and neurological excitability in children.
Abstract:
The authors valued some metabolic parameters (sodium, potassium, calcium, blood levels of glucose, proteins, nitrogen, creatinine) in 159 children with febrile convulsions and compared the results with those of a group of children with fever (50 subjects) and of a group of health, fever free children (50 subjects). In the patients with febrile convulsions serum levels of sodium, calcium and osmolarity resulted significantly lower than those obtained in both control groups. The electrolytic modification (overall hyponatremia, probably due to a SIADH) may have a role in short-term relapses of febrile convulsions. Hyponatremia is present also in some children with high fever, without seizures; it may be that hyponatremia, in predisposed subjects, lower the threshold of neuromuscular excitability.